This study looked at the effects of magnetic water and fly ash on the mechanical and durability characteristics of concrete. To estimate the effect of magnetization on the properties of water, Numerous experiments on treated and untreated water, such as “pH, acidity, alkalinity, chlorides, and total solids”, have been carried out with the assistance of a neodymium rare earth magnet with a strength of 1.5 Tesla. Fly ash has been replaced with cement in weight amounts of 10, 20, 30, and 40%. Moreover, the present study investigated the “compressive strength, split tensile strength, water absorption, sorptivity and corrosion resistance tests” of concrete mixes after 28 days of curing. It was discovered that including magnetized water in the concrete mix has shown an increase of 38.46% in compressive strength and that the optimal proportion of fly ash is 30%. Similarly, the magnetized water in concrete has the potential to really boost the durability of concrete.